you have missing to join transaction nos. use below query
Select d.Transaction_No,d.Amount_Debit,d.Debit_Date,d.Total_Amount_Debit,c.Transaction_No,c.Amount_Credit,c.Credit_Date,c.Total_Amount_Credit
from Account_Debit d
left join Account_Credit c on c.Account_No=d.Account_No and d.Transaction_No=c.Transaction_No
where d.Account_No='1234-5';
Happy Coding!
:)